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Finding the Fourth Proportional to 20,305.20, 30,461.04 and 8,618.52

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Solution

The fourth proportional to 20,305.20, 30,461.04 and 8,618.52 is: 12,929.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,305.20 : 30,461.04 = 8,618.52 : x
  2. Step 2: Convert to fraction form
    20,305.20/30,461.04 = 8,618.52/x
  3. Step 3: Cross multiply
    20,305.20x = 30,461.04 × 8,618.52
  4. Step 4: Simplify right side
    20,305.20x = 262,529,082.46
  5. Step 5: Solve for x
    x = 262,529,082.46/20,305.20
  6. Step 6: Final answer
    x = 12,929.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.